Sixth-grader Kayo Benton and her friend Rosie are busy trying to find a good home for old Mrs. Tallie's cat, Muffin. But when Rosie gets a menacing phone call warning her to stay away from the old woman, the girls begin to realize that it isn't just the cat that needs help. In her stately mansion, Mrs. Tallie is getting sicker each day. Her gardener keeps chasing Kayo and Rosie away. And there's a poisonous plant sitting near Mrs. Tallie's garden....

Join the stars of the Frightmares thrillers, Rosie and Kayo, as they take on bright lights and dark deeds to uncover the art thief responsible for stealing the most valuable painting of the Oakwood Art Museum. Rosie's dog is a star! Rosie Saunders and Kayo Benton are thrilled when their new friend Lyle Guthrie recommends Bone Breath the dog for a carry-on part in Pirate's Plunder at the Oakwood Community Theater. The girls are so busy working backstage...

Sixth-graders Rosie and Kayo have a new Care Club project. They are taking Bone Breath, Rosie's dog, to the Oakwood Nursing Center to visit the residents. Old Mr. Winters is one of the girls' favorite people there, even if he does ramble on about crazy things, like seeing a man with a gun across the street. One night, when Rosie and Kayo watch the evening news, they discover that Mr. Winters isn't so crazy after all. A murder has occurred in the house...